The objective of this research was to maximize not only accessibility but also user comprehension of web pages, particularly those containing tabular and graphical information. Based on literature and interviews with blind and low vision students and their teachers, the research team developed guidelines for web developers to describe charts and graphs commonly used in statistical applications. A usability study was then performed to evaluate the effectiveness of these new guidelines. Accessibility and comprehension for both blind and low vision users were increased when web pages were developed following the new guidelines.